Improvement in cranes



IINTTED STATES PATENT EEICE.;

F. BUMPF, OF GOLD SPRING, NEW YORK.

IMPROVEMENT lN CRANES.

To all whom it may concern: l

Beit known that I, F. RUMPF, of Cold Spring, in the county ot' Putnam and State of New York, have invented a new and Improved Application ot' Power to Cranes; and I do hereby declare that the following` is a full, clear, and exact description thereof, which will enable those skilled in the art to lnake Iand use the saule, reference being had to the accompanying drawings, forming part of this specitication, in which- Figure l is a side sectional view of my invention, taken inthe line x x, Fig. 2, Fig. 2, a plan or top view of the sanne. I

Similar letters of reference indicate corresponding parts.

This invention relates toa simple attachment for cranes whereby an ordinary handcrane, (those which have been hitherto operated by the manual turning of a crank) may be operated by other power from atiXed shaftthat is to say, a shaft ruiming in fixed bearin gs-and the crane'rendered capable of being turned in the saine way as usual, or as the ordinary hand-crane.

A represents the upright post or shaft of the crane, having its bearings a in a suitable frame, B, and passing centrally through a horizontal wheel or circular bed, C, which is keyed or otherwise secured to the post or shaft A. On this circular bed C there is placed a beveled-toothed rim, D, in such a manner that it may turn freely on C and be prevented from casuallyA slipping oft' from it. To et't'ect this result the rim D may be provided with a pendent flange, b, to project down over the edge ot' the bed C, as shown in Fig. l.

To the wheel or bed C there is secured a bracket, E, in which a shaft, F, is tted, having upon it a pulley, G, and a bevel-pinion, H, the latter gearinginto the rim D.

I is a shaft placed horizontally on the frame lB, and having a bevel-pinion, J, upon it, Which also gears into the toothed rim D. The power is applied to the crane for hoisting purposes through the medium of this shaft I, pinion J, and rim D, the latter, as it rotates, turning the pinion H, which gives motion to shaft F, which, through the medium of a belt or gearing, turns the windlass ofthe crane. By this arrangement it will be seen that the crane may be turned either to the right or left without in the least affecting either the driving or hoisting mechanism, as the toothed rim D is allowed to turn independently of the wheel or bed C, and consequently can turn the shaft F from the driving-shaft I even when the crane or post or shaft A is turned. It will be seen, therefore, that by this invention an ordinary hand-crane may be converted into a powercrane. .f

l The driving-shaft I may be provided with an idle-pulley and two working-pulleys, one of the latter being provided with a straight and they other with a cross belt, so that the shaft F may be rotated in either direction to hoist and lower articles.

Having thus described my invention, I claim as new and desire to securel by Letters Patent- The adaptation of an ordinary hand-crane to a power-crane by means of the loose toothed rirn D, placed on the wheel or bed C on the crane post or shaft D, driven from the powershaft l by a pinion, J, and communicating motion by a pinion, H, to a shaft, F, which has its bearings in a bracket, E, attached to the wheel or bed C, and connected with the windlass of the crane by a belt, chain, or gearing, substantially as shown and' described.

F. RUMPF. Witnesses:

WILLIAM HUMPHEEYs, Jr., OTTO HOEMANN. 

